I knew very little of Chris Marker's personal life, but I do know how much he influenced film as a story telling device. His visuals are an aesthetic that is used in most all documentary films these days. My love for his work started with a little film I saw long ago about one of his cats, a Guilliame.
If you're looking for an inspirational fragment or centre of modern avant garde, I highly recommend reading anything or seeing anything on Chris Marker. If you're into essays, poetic forms, and the aesthetic of documenting events on film, do that as well.
I really enjoyed Nora M. Ater's three staged analysis on Marker. It gave me a thorough insight into his motivations in the film essay medium: taking visuals, all shocking and mundane alike, and recreating a giant memory snapshot on film.
It lays bare a study of this most enigmatic filmmaker and visionary.
I'm also enjoying a few of these University of Illinois Press books on Film Studies.